Not sure what the structural makeup of the telescoping nose would be, but such a design is probably aimed at spreading out the sound pressure levels for over-land use, to be retracted for subsonic flight. There is pressure on the FAA to switch to a qualified performance scheme in lieu of the current prohibition on continental S/S flight. As we have discussed on prior threads, these jets are not suitable for small uncontrolled fields.

Here's a related thread-SS Bizjet News